Antenna rules in GF 45 RFSOI

[big_fudge98]

Hi,

I have a question about resolving antenna errors in GF45RFSOI process.
I could not find any antenna diodes in this process. So for resolving antenna errors, I added a 'bitieres'. From what I understand, bitieres is a contact from M1 to the substrate. So if we use bitieres for multiple nets, will they not create a short through the substrate? Or is the substrate resistance high enough, so that this short will not cause issues?

Thanks

 

[dick_freebird]

SOI is a tough problem for antenna because there may be either no handy place to grab a global substrate tap, or the "web" (front side silicon with no device layers) must be tied to make it so.

Antenna diode is just a minimum diode, whether the kit supports diodes in the core you'd have to investigate. If not then a minimum GG NMOS dummy's drain would do. Fin type technologies have a fixed pattern in the lower layers and wouldn't allow random placement of taps and antenna diodes other than can be made by a fin segment.